:root{--bg:#0f172a;--card:#111827;--text:#e5e7eb;--muted:#9ca3af;--accent:#60a5fa;--border:#263244}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:linear-gradient(180deg,#0b1220,#111827);color:var(--text);line-height:1.65}
.wrap{width:min(860px,92%);margin:0 auto}header{padding:28px 0;border-bottom:1px solid var(--border)}nav{display:flex;gap:18px;flex-wrap:wrap}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
main{padding:56px 0 72px}.card{background:rgba(17,24,39,.88);border:1px solid var(--border);border-radius:18px;padding:32px;box-shadow:0 18px 60px rgba(0,0,0,.22)}
h1{font-size:clamp(2rem,5vw,3.2rem);line-height:1.1;margin:0 0 18px}h2{margin-top:32px}.muted{color:var(--muted)}footer{border-top:1px solid var(--border);padding:24px 0 36px;color:var(--muted);font-size:.95rem}